1. Where can I get it?
2. If I'm putting on a scope, do I sight it in and then put in on?
3. do you put in on as a seal, or do you put in on the whole screw then screw it in?
4. how do you adjust items after you've used loctite?

Suggest using blue loctite instead of red, it sets up but not as fast and is easier to take the screw out when you want to disassemble it. Red loctite doesn't want to let go once it is set and it sets fast.

__________________
Good intentions will always be pleaded for any assumption of power. The Constitution was made to guard the people against the dangers of good intentions. There are men in all ages who mean to govern will, but they mean to govern. They promise to be good masters, but they mean to be masters.
--Daniel Webster--

To easily and quickly remove a screw that has been "loctited" in place, heat the screw with a soldering iron or soldering gun and the loctite will soften so you can remove the screw. The softening is permanent so if you want to reinstall you'll have to clean the screw and screwhole carefully and reapply loctite.

Obviously the heat solution won't work if the screw goes through something like plastic or anything else heat-sensitive.

__________________
Good intentions will always be pleaded for any assumption of power. The Constitution was made to guard the people against the dangers of good intentions. There are men in all ages who mean to govern will, but they mean to govern. They promise to be good masters, but they mean to be masters.
--Daniel Webster--

Loctite will say on the package what color to use for what size screw, If I remember right anything less than a 1/4" should get purple 222m.
Interestingly on their 50 BMG rifles, Barrett does not recommend any Loctite for the cap screws or base nuts but did say if i must use some use only purple on the cap screws and blue of base screws/nuts. I clean all oil off the screws and female threads with alcohol and put a small amount on the screw threads.
Barrett may be saying this because they recommend a 35 "/lbs torque setting on the cap screws and 65 "/lbs on the base screws/nuts. You also will not get the right torque reading if you use anti-seize or oil.
It is very important to torque all scope mounts and cap screws to manufacturers specs though most people do not do this.

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